There’s nothing cuter than a puppy – now, picture that puppy paddling around learning to swim in a pool and it’s hard not to say “awww.” Award-winning animal photographer Seth Casteel has released a new book capturing those adorable moments in, “Underwater Puppies.”

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“To create this series of photos, I taught swimming lessons to over 1,500 puppies, helping them build confidence and safety skills in the water,” Casteel explains on his website. “Many of the puppies only swam for a few minutes and learned about buoyancy, their physicality in the water, and most importantly, how to get out of a pool.”

(MORE: Cute Dogs Underwater Will Warm Your Heart (PHOTOS))

Casteel used puppies from several animal rescue organizations, whose ages ranged from 6 weeks to 6 months. “The goal was to feature some amazing rescue puppy ambassadors to remind people that adoption is a wonderful option!”

The California-based photographer also wanted to raise awareness about water safety for pets.

“Each year, thousands of pets drown in backyard swimming pools in the United States because proper safety measures have not been taken by their human companions. These terrible tragedies can be prevented,” explained Casteel. “If you are a pool owner or your dog has access to a pool, please consider all precautions including limiting access to the pool, alarms, proper pool exits and most importantly, teaching your pet how to get out of the pool in case they choose to go in, or accidentally fall in.”

The book is a sequel to his New York Times Best Seller “Underwater Dogs.” To see more of Casteel’s work visit his website.